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Abraham Erasmus Van Wyk
Abraham Erasmus van Wyk, also known as Braam van Wyk (born 1952, Wolmaransstad) is a South African plant taxonomist. He has been responsible for the training of a significant percentage of the active plant taxonomists in South Africa and has also produced the first electronic application (app) for the identification of trees in southern Africa. Education and career Van Wyk was born in 1952 in Wolmaransstad, North-West Province, South Africa and grew up on a maize (corn) and cattle farm. In 1973, he completed a BSc (Botany, Zoology, Physiology) at Potchefstroom University for Christian Higher Education (PCHO), followed by a BSc (Hons) in 1974, a Higher Diploma in Education in 1976 and a MSc (Botany) in 1977 (supervised by DJ Botha). All of the degrees he completed at PCHO with obtained with distinction. He then went on to the University of Pretoria where he obtained his PhD in botany with a thesis on the classification of the genus Eugenia (''Myrtaceae'') in southern Africa. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolmaransstad
Wolmaransstad (Afrikaans for "Wolmarans City") is a maize-farming town situated on the N12 (South Africa), N12 between Johannesburg and Kimberley, South Africa, Kimberley in North West Province (South Africa), North West Province of South Africa. The town lies in an important alluvial diamond-mining area and it is the main town of the Maquassi Hills Local Municipality. Town 245 km south-west of Johannesburg and 56 km north-east of Bloemhof. It was laid out on the farms Rooderand and Vlakfontein in 1888, and proclaimed a town in 1891. Named after Jacobus M. A. Wolmarans, then member of the Executive Council. Wolmaransstad originated in 1891 on the banks of the Makwasi River ''(Bushmen, San word for a type of wild spearmint)'' and takes its name from J. M. A. Wolmarans, a Volksraad of the South African Republic, volksraad councilman. Wolmaransstad serves a large community and is an important diamond buying center. The Dutch Reformed church building was designed by Gerar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatomy
Anatomy () is the branch of biology concerned with the study of the structure of organisms and their parts. Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old science, having its beginnings in prehistoric times. Anatomy is inherently tied to developmental biology, embryology, comparative anatomy, evolutionary biology, and phylogeny, as these are the processes by which anatomy is generated, both over immediate and long-term timescales. Anatomy and physiology, which study the structure and function (biology), function of organisms and their parts respectively, make a natural pair of related disciplines, and are often studied together. Human anatomy is one of the essential basic research, basic sciences that are applied in medicine. The discipline of anatomy is divided into macroscopic scale, macroscopic and microscopic scale, microscopic. Gross anatomy, Macroscopic anatomy, or gross anatomy, is the examination of an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Allen Dyer
Robert Allen Dyer (21 September 1900 Pietermaritzburg – 26 October 1987 Johannesburg) was a South African botanist and taxonomist, working particularly on Amaryllidaceae and succulent plants, contributing to and editing of ''Bothalia'' and ''Flowering Plants of Africa'' and holding the office of Director of the Botanical Research Institute in Pretoria from 1944 to 1963. Education and career Attended Michaelhouse and Natal University College 1919-1923, obtaining the degrees of M.Sc. in 1923 and D.Sc. in 1937. Appointed as assistant to Selmar Schonland in Grahamstown in 1925, as well as curator of the Albany Museum Herbarium. After doing a three-year stint (1931-1934) as liaison officer with the Royal Botanic Gardens, Kew, he was transferred to the National Herbarium in Pretoria. Here he became Chief and subsequently Director from 1944 to 1963. He revived the Botanical Survey Section and started the Pretoria National Botanic Garden, as well as editing ''Bothalia'', ''The Floweri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Aloe Species
This is a list of the species of the genus '' Aloe''. , the World Checklist of Selected Plant Families accepts about 580 species and hybrids.Search for "Aloe", A * '' Aloe aaata'' T.A.McCoy & Lavranos – Saudi Arabia * '' Aloe aageodonta'' L.E.Newton – Kenya (Kitui Distr.) * '' Aloe abyssicola'' Lavranos & Bilaidi – S. Yemen (Jabal Al-Arays) * '' Aloe aculeata'' Pole-Evans – S. Zimbabwe to Limpopo * '' Aloe acutissima'' H.Perrier – Madagascar * '' Aloe adigratana'' Reynolds – Eritrea to N. Ethiopia * '' Aloe affinis'' A.Berger – Mpumalanga * ''Aloe africana'' Mill. – S. Cape Province * '' Aloe ahmarensis'' Favell, M.B.Mill. & Al-Gifri – S. Yemen * '' Aloe alaotrensis'' J.-P.Castillon * ''Aloe albida'' (Stapf) Reynolds – Mpumalanga to Swaziland * ''Aloe albiflora'' Guillaumin – S. Madagascar * '' Aloe albostriata'' T.A.McCoy, Rakouth & Lavranos – Central Madagascar * '' Aloe albovestita'' S.Carter & Brandham – Djibouti to N. Somalia * '' Aloe aldabre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecology
Ecology () is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere level. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and it is not synonymous with environmentalism. Among other things, ecology is the study of: * The abundance, biomass, and distribution of organisms in the context of the environment * Life processes, antifragility, interactions, and adaptations * The movement of materials and energy through living communities * The successional development of ecosystems * Cooperation, competition, and predation within and between species * Patterns of biodiversity and its effect on ecosystem processes Ecology has practical applications in conservation biology, wetland management, natural resource managemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floristics
{{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Systematics
Biological systematics is the study of the diversification of living forms, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: cladograms, phylogenetic trees, phylogenies). Phylogenies have two components: branching order (showing group relationships) and branch length (showing amount of evolution). Phylogenetic trees of species and higher taxa are used to study the evolution of traits (e.g., anatomical or molecular characteristics) and the distribution of organisms (biogeography). Systematics, in other words, is used to understand the evolutionary history of life on Earth. The word systematics is derived from the Latin word '' systema,'' which means systematic arrangement of organisms. Carl Linnaeus used 'Systema Naturae' as the title of his book. Branches and applications In the study of biological systematics, researchers use the different branches to further understand the relationshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytosociology
Phytosociology, also known as phytocoenology or simply plant sociology, is the study of groups of species of plant that are usually found together. Phytosociology aims to empirically describe the vegetative environment of a given territory. A specific community of plants is considered a social unit, the product of definite conditions, present and past, and can exist only when such conditions are met. In phyto-sociology, such a unit is known as a phytocoenosis (or phytocoenose). A phytocoenosis is more commonly known as a plant community, and consists of the sum of all plants in a given area. It is a subset of a biocoenosis, which consists of all organisms in a given area. More strictly speaking, a phytocoenosis is a set of plants in area that are interacting with each other through competition or other ecological processes. Coenoses are not equivalent to ecosystems, which consist of organisms and the physical environment that they interact with. A phytocoensis has a distribution whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palynology
Palynology is the "study of dust" (from grc-gre, παλύνω, palynō, "strew, sprinkle" and '' -logy'') or of "particles that are strewn". A classic palynologist analyses particulate samples collected from the air, from water, or from deposits including sediments of any age. The condition and identification of those particles, organic and inorganic, give the palynologist clues to the life, environment, and energetic conditions that produced them. The term is commonly used to refer to a subset of the discipline, which is defined as "the study of microscopic objects of macromolecular organic composition (i.e., compounds of carbon, hydrogen, nitrogen and oxygen), not capable of dissolution in hydrochloric or hydrofluoric acids". It is the science that studies contemporary and fossil palynomorphs (paleopalynology), including pollen, spores, orbicules, dinocysts, acritarchs, chitinozoans and scolecodonts, together with particulate organic matter (POM) and kerogen found in sedimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytogeography
Phytogeography (from Greek φυτόν, ''phytón'' = "plant" and γεωγραφία, ''geographía'' = "geography" meaning also distribution) or botanical geography is the branch of biogeography that is concerned with the geographic distribution of plant species and their influence on the earth's surface. Phytogeography is concerned with all aspects of plant distribution, from the controls on the distribution of individual species ranges (at both large and small scales, see species distribution) to the factors that govern the composition of entire communities and floras. Geobotany, by contrast, focuses on the geographic space's influence on plants. Fields Phytogeography is part of a more general science known as biogeography. Phytogeographers are concerned with patterns and process in plant distribution. Most of the major questions and kinds of approaches taken to answer such questions are held in common between phyto- and zoogeographers. Phytogeography in wider sense (or geobot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embryology
Embryology (from Greek ἔμβρυον, ''embryon'', "the unborn, embryo"; and -λογία, '' -logia'') is the branch of animal biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses. Additionally, embryology encompasses the study of congenital disorders that occur before birth, known as teratology. Early embryology was proposed by Marcello Malpighi, and known as preformationism, the theory that organisms develop from pre-existing miniature versions of themselves. Aristotle proposed the theory that is now accepted, epigenesis. Epigenesis is the idea that organisms develop from seed or egg in a sequence of steps. Modern embryology, developed from the work of Karl Ernst von Baer, though accurate observations had been made in Italy by anatomists such as Aldrovandi and Leonardo da Vinci in the Renaissance. Comparative embryology Preformationism and epigenesis As recently as the 18th century, the prevailin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nomenclature
Nomenclature (, ) is a system of names or terms, or the rules for forming these terms in a particular field of arts or sciences. The principles of naming vary from the relatively informal naming conventions, conventions of everyday speech to the internationally agreed principles, rules and recommendations that govern the formation and use of the specialist terms used in scientific and any other disciplines. Naming "things" is a part of general human communication using words and language: it is an aspect of everyday Taxonomy (general), taxonomy as people distinguish the objects of their experience, together with their similarities and differences, which observers Identification (information), identify, name and wikt:classification, classify. The use of names, as the many different kinds of nouns embedded in different languages, connects nomenclature to theoretical linguistics, while the way humans mentally structure the world in relation to semantics, word meanings and Experience ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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